Improvement in sewing-machine shuttles



S. Nl. TYLER.

Sewing Machine Shutt|e. i 1 N0' 58,182; PatentedI Sept. 18, 1866.

fdd. Mmm/Zu VUNITED STATES PATENT Carien,

SIDNEY M. TYLER, OF BROOKLYN, ASSIGNOR TO THE` EMPIRE SEWING p MACHINE COMPANY,

lOF NEW YORK, N. Y.

l-lvlPEovl-:rvlEni 1N SEWINe-MACHINE sHuTTLEs.

Specification forming part of Letters Patent N0. 58,182, dated September 18, 1866.

To all whom it may concern:

Be it known that I, SIDNEY M. TYLER, of Brooklyn, in the county of Kings and State of New York, have invented, made, and applied to use a certain new and useful Improvement in Shuttles for Sewing-Machines and I do hereby declare the following to be a full, clear, and exact description of the said invention,

y reference being had to the annexed drawings,

making part of this specification, wherein- Figure l is a plan of the shuttle, and Fig. 2 is an elevation of the shuttle, showing its position relatively to the needle.

Similar letters denote the same parts.

`In sewing-machines it is desirable that the shuttle-thread draw off from the shuttle at or near the center of its length, so that there may be but little slack thread. In order that each stitch may be properly drawn up and completed, it i-s important that the tightening of the stitch take place as the needle reaches its extreme motion in rising and the shuttle simultaneously reaches its extreme movement horizontally; but difficulty is often experienced from the fact that the needle in its next descent is liable to come in contact with and pass through the shuttle-thread, split-ting the same, or Aelse to pass between the shuttle and its thread.

To obviate this difficulty is the object of the present invention, which consists in a rearward-projectin g point upon the upper portion of the heel of the shuttle, inclined on its under side and tapering toward the needle side of the shuttle, so that the loop of needlethread "is not detained or enlargedas it is drawn up and passes off the shuttle; but such tapering projecting point forms a rest for the end of a spring-detainerv (beneath which the shuttlethread passes) at a point to the rear of the heel or usual back end of the shuttle, so that the backward movement of the shuttle shall draw the shuttle-thread out of the path of the i descending needle before the point of the needle perforates the cloth, and the shape of the said spring and its friction cause the backward movement of the shuttle to keep the vslack shuttle-thread entirely out "of the way of the needle.

In the drawings, a represents the shuttlecase; b b, the holes for the thread to pass through to produce tension. C is the spring .thread-detainer, attached to the shuttle-case at the end l, and the loose end 2 passes into a hole in the projecting rear or point, 3, of the shuttle,- and the edge of the spring is convex, bowing away from the at side of the shuttle. e is the needle. The needlethread is shown by red lines and the shuttle thread by blue lines.

The shuttle and needle are to be driven by competent means, and which, forming no part of this invention, are not further described.

It will now be seen that the form of the projecting rear 3 of the shuttle is such as will not prevent the loop of needle-thread drawing off freely from the shuttle, and that the shuttle thread, passing beneath the detainer at the rear end ofthe shuttle, is carried back in the direction of the feed of the fabric and takes the shuttle thread out of the way of the descending needle-point before that point perforates the fabric, and the friction and curved edge of the spring o continue to draw on the shuttle-thread and constantly keep the same away from the path of the needle.

By this construction of shuttle there is no actual increase in the length between the point and heel of the shuttle, and the drawing off of the loop of needle-'thread from the rear oi' the shuttle is not obstructed, or the said loop i of needle-thread in any manner enlarged, be-

cause the tapering rearward-projectin g end is always smaller than the loop of needlethread at the particular point as it is drawn up; but the springfriction to the shuttle-thread is at a point to the rear of the heel of the shuttle, thereby carrying the shuttlethread .on the return movement farther back out ofthe way of the descending needle than would be the case if the spring-friction were applied, as it has Aheretofore been, between the heel and point of the shuttle.

What I claim, and desire to secure by Letters Patent, is-

The tapering rearward-projecting,point 3 of the shuttle, 1n combination with the spring thread-detainer o, extending to the rear ofthe heel of the shuttle, as and for the purposes set forth.

In witness whereof I have hereunto set m signature this 9th day of June, A D. 1866.

S. M. TYLER.

Witnesses:

GEO. D. WALKER, GHAs. H. SMITH. 

